diff --git a/static/css/conversations.css b/static/css/conversations.css
index c961dbb..c93cdd6 100644
--- a/static/css/conversations.css
+++ b/static/css/conversations.css
@@ -160,6 +160,15 @@
     background: var(--conv-primary-hover);
 }
 
+.btn-new-group {
+    background: var(--conv-surface);
+    color: var(--conv-primary);
+    border: 1.5px solid var(--conv-primary);
+}
+.btn-new-group:hover {
+    background: var(--conv-primary-light);
+}
+
 @media (max-width: 768px) {
     .btn-new-text { display: none; }
     .btn-new-conversation { width: 36px; padding: 0; }
diff --git a/static/js/conversations.js b/static/js/conversations.js
index fd3e791..50d60d8 100644
--- a/static/js/conversations.js
+++ b/static/js/conversations.js
@@ -2201,6 +2201,246 @@
         },
     };
 
+    // ============================================================
+    // 10b. NEW GROUP MODAL
+    // ============================================================
+
+    var NewGroupModal = {
+        _quill: null,
+        _selectedMembers: [],
+        _debounceTimer: null,
+
+        init: function () {
+            var btn = document.getElementById('newGroupBtn');
+            var modal = document.getElementById('newGroupModal');
+            if (!btn || !modal) return;
+
+            btn.addEventListener('click', function () {
+                NewGroupModal.open();
+            });
+
+            var closeBtn = document.getElementById('closeNewGroup');
+            var cancelBtn = document.getElementById('cancelNewGroup');
+            if (closeBtn) closeBtn.addEventListener('click', function () { modal.style.display = 'none'; });
+            if (cancelBtn) cancelBtn.addEventListener('click', function () { modal.style.display = 'none'; });
+
+            var sendBtn = document.getElementById('sendNewGroup');
+            if (sendBtn) sendBtn.addEventListener('click', function () { NewGroupModal.send(); });
+
+            var searchInput = document.getElementById('groupRecipientSearch');
+            if (searchInput) {
+                searchInput.addEventListener('input', function () {
+                    clearTimeout(NewGroupModal._debounceTimer);
+                    NewGroupModal._debounceTimer = setTimeout(function () {
+                        NewGroupModal.filterRecipients(searchInput.value);
+                    }, 200);
+                });
+            }
+        },
+
+        open: function () {
+            NewGroupModal._selectedMembers = [];
+            var nameInput = document.getElementById('groupNameInput');
+            if (nameInput) nameInput.value = '';
+            var searchInput = document.getElementById('groupRecipientSearch');
+            if (searchInput) searchInput.value = '';
+            var suggestions = document.getElementById('groupRecipientSuggestions');
+            if (suggestions) suggestions.innerHTML = '';
+            var selected = document.getElementById('groupSelectedRecipients');
+            if (selected) selected.innerHTML = '';
+
+            var editorEl = document.getElementById('groupMessageEditor');
+            if (editorEl) {
+                editorEl.innerHTML = '';
+                NewGroupModal._quill = new Quill('#groupMessageEditor', {
+                    theme: 'snow',
+                    placeholder: 'Pierwsza wiadomość (opcjonalna)...',
+                    modules: {
+                        toolbar: [['bold', 'italic'], ['link'], ['clean']],
+                    },
+                });
+            }
+
+            var modal = document.getElementById('newGroupModal');
+            if (modal) modal.style.display = 'flex';
+            if (nameInput) nameInput.focus();
+        },
+
+        filterRecipients: async function (query) {
+            var suggestions = document.getElementById('groupRecipientSuggestions');
+            if (!suggestions) return;
+            suggestions.innerHTML = '';
+
+            query = (query || '').trim();
+            if (query.length < 2) return;
+
+            suggestions.innerHTML = '<div style="padding:10px 12px;color:var(--conv-text-muted);font-size:13px">Szukam...</div>';
+
+            try {
+                var resp = await fetch('/api/users/search?q=' + encodeURIComponent(query), {
+                    headers: { 'X-CSRFToken': window.__CSRF_TOKEN__ },
+                });
+                if (!resp.ok) throw new Error('search failed');
+                var users = await resp.json();
+
+                suggestions.innerHTML = '';
+                var selectedIds = NewGroupModal._selectedMembers.map(function (r) { return r.id; });
+                var matches = users.filter(function (u) {
+                    return selectedIds.indexOf(u.id) === -1;
+                });
+
+                if (!matches.length) {
+                    suggestions.innerHTML = '<div style="padding:10px 12px;color:var(--conv-text-muted);font-size:13px">Brak wyników</div>';
+                    return;
+                }
+
+                matches.forEach(function (u) {
+                    var item = el('div', 'suggestion-item');
+                    item.style.padding = '8px 12px';
+                    item.style.cursor = 'pointer';
+                    item.style.display = 'flex';
+                    item.style.alignItems = 'center';
+                    item.style.gap = '8px';
+                    item.style.borderBottom = '1px solid var(--conv-border)';
+
+                    var avatar = el('div', 'conv-avatar ' + avatarColor(u.name));
+                    avatar.style.width = '30px';
+                    avatar.style.height = '30px';
+                    avatar.style.minWidth = '30px';
+                    avatar.style.fontSize = '11px';
+                    avatar.textContent = initials(u.name);
+
+                    var info = el('div', '');
+                    var nameEl = el('div', '', u.name || u.email);
+                    nameEl.style.fontSize = '14px';
+                    nameEl.style.fontWeight = '500';
+                    if (u.company_name) {
+                        var companyEl = el('div', '', u.company_name);
+                        companyEl.style.fontSize = '12px';
+                        companyEl.style.color = 'var(--conv-text-muted)';
+                        info.appendChild(nameEl);
+                        info.appendChild(companyEl);
+                    } else {
+                        info.appendChild(nameEl);
+                    }
+
+                    item.appendChild(avatar);
+                    item.appendChild(info);
+
+                    item.addEventListener('click', function () {
+                        NewGroupModal.selectMember(u);
+                    });
+                    item.addEventListener('mouseenter', function () {
+                        item.style.background = 'var(--conv-surface-secondary)';
+                    });
+                    item.addEventListener('mouseleave', function () {
+                        item.style.background = '';
+                    });
+
+                    suggestions.appendChild(item);
+                });
+            } catch (e) {
+                suggestions.innerHTML = '<div style="padding:10px 12px;color:var(--conv-text-muted);font-size:13px">Błąd wyszukiwania</div>';
+            }
+        },
+
+        selectMember: function (user) {
+            NewGroupModal._selectedMembers.push(user);
+
+            var container = document.getElementById('groupSelectedRecipients');
+            if (container) {
+                var pill = el('span', '');
+                pill.style.display = 'inline-flex';
+                pill.style.alignItems = 'center';
+                pill.style.gap = '4px';
+                pill.style.padding = '4px 10px';
+                pill.style.borderRadius = '16px';
+                pill.style.background = 'var(--conv-primary-light)';
+                pill.style.fontSize = '13px';
+                pill.style.color = 'var(--conv-text-primary)';
+                pill.style.margin = '2px';
+
+                pill.textContent = user.name || user.email;
+                var removeBtn = el('button', '', '\u00d7');
+                removeBtn.style.border = 'none';
+                removeBtn.style.background = 'transparent';
+                removeBtn.style.cursor = 'pointer';
+                removeBtn.style.fontSize = '14px';
+                removeBtn.style.color = 'var(--conv-text-muted)';
+                removeBtn.style.padding = '0';
+                removeBtn.style.lineHeight = '1';
+                removeBtn.addEventListener('click', function () {
+                    NewGroupModal._selectedMembers = NewGroupModal._selectedMembers.filter(function (r) {
+                        return r.id !== user.id;
+                    });
+                    pill.remove();
+                });
+                pill.appendChild(removeBtn);
+                container.appendChild(pill);
+            }
+
+            var searchInput = document.getElementById('groupRecipientSearch');
+            if (searchInput) searchInput.value = '';
+            var suggestions = document.getElementById('groupRecipientSuggestions');
+            if (suggestions) suggestions.innerHTML = '';
+            if (searchInput) searchInput.focus();
+        },
+
+        send: async function () {
+            var nameInput = document.getElementById('groupNameInput');
+            var groupName = (nameInput ? nameInput.value : '').trim();
+
+            if (NewGroupModal._selectedMembers.length < 2) {
+                alert('Wybierz co najmniej dwóch członków grupy');
+                return;
+            }
+
+            if (state._isCreating) return;
+            state._isCreating = true;
+
+            var messageContent = '';
+            if (NewGroupModal._quill) {
+                var text = NewGroupModal._quill.getText().trim();
+                if (text) {
+                    messageContent = NewGroupModal._quill.root.innerHTML;
+                }
+            }
+
+            var memberIds = NewGroupModal._selectedMembers.map(function (r) { return r.id; });
+
+            // Auto-generate name if not provided
+            if (!groupName) {
+                var names = NewGroupModal._selectedMembers.map(function (r) { return r.name || r.email; });
+                names.push(window.__CURRENT_USER__.name);
+                groupName = names.join(', ');
+            }
+
+            try {
+                var result = await api('/api/conversations', 'POST', {
+                    member_ids: memberIds,
+                    name: groupName,
+                    message: messageContent,
+                });
+
+                var modal = document.getElementById('newGroupModal');
+                if (modal) modal.style.display = 'none';
+
+                var existing = state.conversations.find(function (c) { return c.id === result.id; });
+                if (!existing) {
+                    state.conversations.unshift(result);
+                } else {
+                    Object.assign(existing, result);
+                }
+                ConversationList.renderList();
+                ConversationList.selectConversation(result.id);
+            } catch (e) {
+                alert('Nie udało się utworzyć grupy: ' + e.message);
+            } finally {
+                state._isCreating = false;
+            }
+        },
+    };
+
     // ============================================================
     // 11. SEARCH
     // ============================================================
@@ -2571,6 +2811,7 @@
         ConversationList.renderList();
         Composer.init();
         NewMessageModal.init();
+        NewGroupModal.init();
         Search.init();
         Pins.init();
         initContextMenu();
diff --git a/templates/messages/conversations.html b/templates/messages/conversations.html
index 0f8388a..f96a37e 100644
--- a/templates/messages/conversations.html
+++ b/templates/messages/conversations.html
@@ -5,7 +5,7 @@
 
 {% block head_extra %}
 <link rel="stylesheet" href="{{ url_for('static', filename='css/quill.snow.css') }}">
-<link rel="stylesheet" href="{{ url_for('static', filename='css/conversations.css') }}?v=11">
+<link rel="stylesheet" href="{{ url_for('static', filename='css/conversations.css') }}?v=12">
 <script src="{{ url_for('static', filename='js/vendor/quill.js') }}"></script>
 <style>
   footer { display: none !important; }
@@ -64,6 +64,15 @@
           </svg>
           <span class="btn-new-text">Nowa wiadomość</span>
         </button>
+        <button class="btn-new-conversation btn-new-group" id="newGroupBtn" title="Nowa grupa">
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+            <path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"></path>
+            <circle cx="9" cy="7" r="4"></circle>
+            <path d="M23 21v-2a4 4 0 0 0-3-3.87"></path>
+            <path d="M16 3.13a4 4 0 0 1 0 7.75"></path>
+          </svg>
+          <span class="btn-new-text">Nowa grupa</span>
+        </button>
       </div>
     </div>
     <div class="conversation-list" id="conversationList">
@@ -208,6 +217,33 @@
     <button data-emoji="✅">✅</button>
   </div>
 
+  <!-- New group modal -->
+  <div class="modal-overlay" id="newGroupModal" style="display:none">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h3>Nowa grupa</h3>
+        <button class="modal-close" id="closeNewGroup">&times;</button>
+      </div>
+      <div class="modal-body">
+        <div class="recipient-input">
+          <label>Nazwa grupy:</label>
+          <input type="text" id="groupNameInput" placeholder="np. Projekt XYZ, Zarząd..." style="margin-bottom:12px">
+        </div>
+        <div class="recipient-input">
+          <label>Członkowie:</label>
+          <input type="text" id="groupRecipientSearch" placeholder="Wpisz imię lub nazwisko...">
+          <div class="recipient-suggestions" id="groupRecipientSuggestions"></div>
+          <div class="selected-recipients" id="groupSelectedRecipients"></div>
+        </div>
+        <div id="groupMessageEditor"></div>
+      </div>
+      <div class="modal-footer">
+        <button class="btn-secondary" id="cancelNewGroup">Anuluj</button>
+        <button class="btn-primary" id="sendNewGroup">Utwórz grupę</button>
+      </div>
+    </div>
+  </div>
+
   <!-- New message modal -->
   <div class="modal-overlay" id="newMessageModal" style="display:none">
     <div class="modal-content">
@@ -256,7 +292,7 @@ window.__CSRF_TOKEN__ = '{{ csrf_token() }}';
 // Load conversations.js after data is set
 (function() {
     var s = document.createElement('script');
-    s.src = '{{ url_for("static", filename="js/conversations.js") }}?v=18';
+    s.src = '{{ url_for("static", filename="js/conversations.js") }}?v=19';
     document.body.appendChild(s);
 })();
 {% endblock %}